Consider the following statements:
1. 2 + 4 + 6 + ... + 2n = n² + n
2. The expression n² + n + 41 always gives a prime number for every natural number n
Which of the above statements is/are correct?
1 only
2 only
Both 1 and 2
Neither 1 nor 2
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In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
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Which among the following events happened earliest ?
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An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
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